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首页> 外文期刊>Renewable Power Generation, IET >New unified NR power flow algorithm for initialising fixed speed wind generation system with turbine characteristics
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New unified NR power flow algorithm for initialising fixed speed wind generation system with turbine characteristics

机译：新的统一NR潮流算法，用于初始化具有涡轮特性的定速风力发电系统

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摘要

Fixed speed induction machine-based wind generators are widely used. Proper initialisation of the models representing fixed speed induction machine-based wind generators connected to grid is of primary concern for stability analysis. The initialisation of fixed speed induction generators (FSIG) has been performed using conventional power flow techniques, but there exists a reactive power mismatch which makes initialisation imprecise. Moreover, turbine characteristics along with control mechanisms are not properly included for initialising the dynamics for stability analysis. A unified Newton-Raphson (NR) method was proposed in literature to include turbine characteristics and control methods for accurate initialisation of FSIG. However, this method creates an extra node for every induction machine causing an increase in the size of the Jacobian and time of execution of power flow algorithm. A new unified-NR method, which does not need an extra node, for initialisation of grid-connected FSIG is proposed in the present work. The proposed unified NR method has been validated on 14-bus, 41-bus, 203-bus, and 1336-bus test systems. The results of the proposed new unified-NR method are compared with existing unified-NR method. The results clearly demonstrate that the proposed method initialisation is accurate with considerably less computational time as compared to existing unified-NR.
机译：基于定速感应机的风力发电机被广泛使用。代表与电网并网的基于定速感应电机的风力发电机的模型的正确初始化是稳定性分析的主要考虑因素。定速感应发电机（FSIG）的初始化已使用常规的潮流技术进行，但是存在无功功率不匹配的问题，这使得初始化不精确。而且，没有适当地包括涡轮机特性和控制机构来初始化用于稳定性分析的动力学。文献中提出了统一的牛顿-拉夫森（NR）方法，该方法包括涡轮机特性和精确初始化FSIG的控制方法。但是，该方法为每个感应电机创建了一个额外的节点，从而导致雅可比行列式算法的大小和潮流算法执行时间的增加。在当前工作中，提出了一种新的统一NR方法，该方法无需额外的节点即可初始化并网FSIG。所提出的统一NR方法已在14总线，41总线，203总线和1336总线测试系统上得到验证。将提出的新的统一降噪方法的结果与现有的统一降噪方法进行了比较。结果清楚地表明，与现有的统一NR相比，所提出的方法初始化是准确的，并且计算时间要少得多。

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